Regarding measurements: https://www.techempower.com/benchmarks/
Also, I am very interested to see new benchmark results once AOT SubstrateVM will be more widely adopted in JVM community. Demo: https://youtu.be/MN6jNIwl2FQ?t=1136
RedHat already working on a framework which takes full benefit of that: https://quarkus.io/
All in all, with upcoming value types, SubstrateVM adoption, fibers and nice languages improvements like records, future is brighter than ever for Java.
Edit. Regarding JVM vs CLR https://news.ycombinator.com/item?id=15955685